Jumping spiders feed on their mothers' spider milk until they leave the nest
Jumping spiders feed on their mothers' spider milk until they leave the nest
.Just as baby mammals are nursed by their mothers, some jumping spider pups depend entirely on the nutritious spider milk their mothers secrete to feed them. A recent study also shows that spider mothers continue to care for and feed their young with a nutritive fluid similar to milk, which contains a quantity of proteins almost four times higher than that of cow's milk, already in their subadult lives and long after you have reached the capacity to feed on your own.
According to the results, this novel and peculiar behavior is functionally and behaviorally comparable with breastfeeding in mammals and suggests the possibility that long-term maternal care with milk supply may be more common in the animal kingdom than it is. I believed to date. In the case of many animals, the growth, development and survival of young people depends entirely on the nutritious foods that their parents often provide.
Mammals produce their own nutritious substances, such as milk, and they nurse their young until they learn to fend for themselves. Although supply cases similar to breastfeeding are known in other parts of the animal kingdom, the intensity and duration of associated parental care are unique to mammals and are thought to increase physical fitness by making it easier for offspring to learn crucial behaviors for survival.
Zhanqi Chen and his colleagues, however, describe a milk supply behavior surprisingly similar, but particularly disconcerting, in the Toxeus magnus, a species of jumping spider that mimics ants. Laboratory observations show that juveniles first drink from droplets deposited on the surface of the nest and then suck directly from the egg-laying opening of the mother.
According to Chen et al., The spiders remained in the nest and were fed spider milk for almost 40 days, shortly before reaching sexual maturity. In addition, the authors found that, while breastfeeding was not critical to the survival of the offspring after attaining independence, the presence of the mother during youth assured to a large extent the general health and survival of adults. Breastfeeding and mother care also seem important to maintain the number of adult females necessary for the optimal reproductive success of the spider: the authors observed that, although mothers gave the same treatment to all the offspring, only the the females return to the reproductive nest after sexual maturity. (Source: AAAS)
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